How long can I use the course once I pay for it? Academy Support November 30, 2016 12:59 Updated Follow For as long as you need it! Once you purchase a course in the GNS3 Academy, it is yours to keep. Related articles Where is the training on how to use GNS3? Can I get a certificate of completion after finishing the course? How do I get help from the instructor? Why can't I see my courses after I purchased them? How do I request a refund? Comments 0 comments Article is closed for comments.